2&period; Notes&colon; 1&rpar;Temperature should be slowly changed during cooling or heating to avoid damaging glass layer&period; 2&rpar; Glass lined reactor with motor can not be used in hydrofluoric acid&comma; medium containing fluorine&comma; phosphoricacid&comma; and alkali concentration greater -than 30&percnt; and temperature greater-than or equal 180 Degree Cent&period; 3&rpar;Separate the cover from the reactor&comma; and correct the level with a level ruler&period; 4&rpar;The man who will enter into the reactor must wear soft shoes and put some elastic materials inside the reactor&period; 5&rpar;Put the gasket in the middle of the flange to keep the distance between the edge of the gasket and flange is equal&period; 6&rpar;Install the anti-loose parts &lpar;see Figure 1&rpar; when installing the stirrer and speed reducer&period; Check the motor rotation direction and must not let the stirrer rotate in reversal direction&period; 7&rpar;Fasten the clamp bolts diagonally&period; 8&rpar;Install the thermometer&comma; pressure gauge or safety valve&period;